Malicious PDF — malware analysis report

Static analysis result for SHA-256 69331f02e22d5b88…

MALICIOUS

PDF

80.2 KB
MD5: 8c6293d3580ad84534c7d6d7056854c1 SHA-1: 57469914154ef7b60192b21f8c68633366e648d6 SHA-256: 69331f02e22d5b88ab5371eb508d98c3493f76cd80e915a58f83747825b81b09
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF and XFA forms. This exploit allows for the execution of arbitrary code, likely to download and run a second-stage payload. The ML classifier strongly indicates maliciousness, and the presence of an embedded file further supports this. The benign URLs are likely unrelated to the malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
c1ba469ded9ca412e465632ce1ac2d4f8ad8d5709beb9681d8342e8aa2eb7fab		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 81389 bytes

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